Invalid plugin registry URL

[svor]

Describe the bug

The list of plugins is empty in che-theia editor. The error from notification window is: Invalid plugin registry URL: "https://plugin-registry-dogfooding.apps.che-dev.x6e0.p1.openshiftapps.com/v3/plugins/" is detected

Che version

• latest
• nightly
• 7.28.1

Steps to reproduce

1. Create Java Maven workpsace
2. Go to View -> PLugins

Expected behavior

List of plugins should be displayed

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• che dogfooding instance

Screenshots

Installation method

• chectl
  • provide a full command that was used to deploy Eclipse Che (including the output)
  • provide an output of chectl version command
• OperatorHub
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• Dev Sandbox (workspaces.openshift.com)
• other: please specify

Eclipse Che Logs

From the browser console:
root INFO Unable to read plugin registry https://plugin-registry-dogfooding.apps.che-dev.x6e0.p1.openshiftapps.com/v3/plugins/

From theia-ide container:
2021-04-07 12:15:43.829 root INFO Cannot access the registry Params: Error: EISDIR: illegal operation on a directory, read 2021-04-07 12:15:44.016 root INFO Unable to read plugin registry Params: https://plugin-registry-dogfooding.apps.che-dev.x6e0.p1.openshiftapps.com/v3/plugins/

[svor]

cc @sunix

[vinokurig]

Is fixed by eclipse-che/che-theia#1072